Ceiling support

ABSTRACT

The ceiling support ( 1 ), the purpose of which is to install a cable routing device ( 6 ), has an end piece ( 3 ) attached to a ceiling ( 9 ) and a connection piece ( 2 ) attaching thereto which is provided with a bracket ( 5 ) on which the load to be carried can be laid. According to the invention, the ceiling support ( 1 ) is mounted on the ceiling ( 9 ) only by means of one mounting bolt ( 8 ) provided on the end piece ( 3 ), and is supported against the ceiling ( 9 ) on the side opposite the load ( 6 ) at least by one support element ( 32, 320 ) which is located at a second distance (L 2 ) from the mounting bolt ( 8 ) such that the load torque with the force (F L ) of the load applied by the mounting bolt ( 8 ) at a first distance (L 1 ) is essentially completely compensated by the counter-torque with the force (F D ) applied to the support element ( 32, 320 ) by the ceiling ( 9 ) at the second distance (L 2 ).

The invention relates to a ceiling support for the purpose of installing, in particular, cable routing devices, conduits, and ceiling constructions, as indicated in the preamble of Claim 1.

In commercial, industrial and governmental buildings, cables for power systems and weak-current/communications systems are often laid within channel-like devices such as cable routing devices—since unlike tubes they lack inherent stability—and are thus routed, for example, from a switch panel to the loads. Cable routing devices of this type are known, for example, from reference [1], the product catalog of LANZ OENSINGEN AG, April 2003.

Reference [1] illustrates basket trays on page 10, multi-run trays on page 18, and extended-multi-run trays on page 34, each of which is employed as governed by the type and quantity of cable to be laid and the building conditions found.

The supporting material for the cable routing devices as used for installation on ceilings is normally composed of a so-called ceiling support to which a bracket is able to be attached. The cable routing devices are laid down on the brackets attached to the ceiling support, each bracket being oriented horizontally, as illustrated in reference [1].

The ceiling support disclosed in reference [1] and composed of galvanized steel or stainless steel has a plate which is able to be bolted to the ceiling, the plate usually being welded, bolted on, or otherwise firmly attached to a usually perforated, bar-shaped or tubular profile section.

After the ceiling support is installed, the bracket can be screwed to the appropriate level of the side wall of the generally U-shaped profiled section, or engaged therein.

Due to the heavy loads, ceiling supports of this type are subject to high stresses, and as a result correspondingly large-dimensioned devices of relatively thick plate steel are employed. The above-mentioned process of bolting-on or engaging the brackets at the appropriate level requires a thick plate, specifically, for the side walls. With conventional ceiling supports, conventional brackets can thus be attached only to one side wall, or at most to one side wall and one back wall, but not simultaneously to two opposing side walls of the bar-shaped or tubular profiled section.

In order to install the ceiling supports securely on the ceiling, they are each attached to the ceiling using multiple mounting bolts.

The overall result is that the material and fabrication expense to produce the ceiling supports is high. The precise location/insertion of holes in the concrete ceilings for multiple mounting bolts—as is described in EP 1 428 972 A2—entails significant expense.

The goal of this invention is therefore to create a ceiling support which is able to be produced at low material cost and is able to be installed at reduced cost in terms of time.

These goals are achieved by a ceiling support which has the features indicated in Claim 1. Advantageous embodiments of the invention are indicated in the remaining subordinate claims.

The ceiling support, which is used in particular to install cable routing devices, has an end piece attached to a ceiling, and an adjoining connection piece, at the bottom end of which a bracket is provided on which the load to be carried can be laid.

According to the invention, the ceiling support is mounted on the ceiling solely by means of a single mounting bolt provided on the end piece and is supported against the ceiling on the side opposite the load at least by one support element which is located at a second distance L2 from the mounting bolt. As a result, the load torque with the load force F_(L) applied at a first distance L1 by the mounting bolt is essentially completely compensated by the counter-torque with the counterforce F_(D) applied to the support element at second distance L2 by the ceiling.

This measure achieves a significant reduction in the tensile force F_(S) which is applied to this single mounting bolt. As long as the second distance L2 is selected so as to be sufficiently large, the magnitude of tensile force F_(S) approximately matches the force F_(L) applied by the retained load.

The ceiling support according to the invention is thus able to be attached with sufficient strength only by means of a single mounting bolt which is preferably displaced eccentrically towards the load. The force effects of the support elements on the ceiling are effected essentially in a point-by-point manner, with the result that advantageous distributions of force are produced within the ceiling support, which force distributions result in an increased load capacity for the ceiling support.

The end piece can be attached to the connection piece either in a one-piece design, or by welding or tox joining. In addition, the end of the connection piece itself can form the end piece by being provided at the top with two opposing openings through which at least one mounting profile attached by the mounting bolt to the ceiling is passed, or into which a t-slot nut attached to the ceiling by the mounting bolt is screwed.

In order to form the at least one support element, the end piece attached to the connection piece can also have a base element at least on the side opposite the load. To the extent a mounting profile optionally attached to the ceiling is inserted in the connection piece, the end of this piece opposite the load, or a connection piece provided there, for example, a bolt inserted therein, can form the support element.

To the extent the connection piece is attached, for example, by a t-slot nut to the ceiling, a connection is preferably used which is provided at least on the side opposite the load with punctiform or continuous support elements. For example, the profile elements of the connection piece, or the edges there individually, are routed upward towards the ceiling projecting beyond the connection piece.

The end pieces and connection pieces can, for example, be one-piece or multi-piece U-profiles, or one-piece or multi-piece rectangular profiles. The connection piece can also be formed out of one pillar loaded for tension and one pillar loaded for compression which are arranged in tandem vertically relative to the bracket. In order to receive the bracket (bottom), and optionally a mounting profile (top), each of the connection pieces is preferably provided with two opposing window openings at the same level.

In preferred embodiments, the end piece can have support elements projecting toward the ceiling on the sides facing and opposite the load such that the end piece forms a bridge running parallel to the bracket. As a result, the bracket supporting the load can be arranged on either side of the ceiling support. Ideally, the end piece is in contact with the ceiling only by means of the mounting bolt and the support elements, and optionally by means of a recess provided in the mounting bolt.

In addition, a dedicated mounting profile can be inserted into the ceiling support to form a support element. The bracket provided with the load can additionally have a support element contacting the ceiling on the side opposite the load.

In another preferred embodiment, the mounting bolt is installed eccentrically on the side of the ceiling support opposite the load such that second distance L2 is preferably at its maximum, with the result that load torque F_(L)*L1 is reduced and a correspondingly reduced force F_(D) is applied by the ceiling through the support elements to the ceiling support.

In another preferred embodiment, the ceiling support is composed of two identical, preferably stackable, fixture parts.

Use of two preferably identical fixture parts has proven to be especially advantageous which have an S-profile. Due to the S-profile, the fixture parts have a high rigidity such that an extraordinarily strong ceiling support is able to be implemented using simple flexible components, which ceiling support is able to be fabricated, installed, and adjusted in height by simple measures (see FIG. 9).

A height-adjustable ceiling support can also be advantageously implemented by designing the fixture part provided with the bracket in two-piece form so as to have a retaining component and a locking component which are able to be attached to each other in a form-locking manner so as to enclose the first fixture part and engage this at the desire level (see FIG. 10).

In order to avoid having to fabricate the support out of thick metal plate simply so as to allow the brackets to be screwed on or engaged in a height-adjustable manner, that is, to correspondingly strongly-dimensioned side walls, preferably either a second additional telescoping box-type profile is attached which is internally height-adjustable within the box-type profile, or a device is installed which is adjustable in height externally along the box-type profile. It is thus not the bracket with is installable in a height-adjustable manner; instead what is height-adjustable is an additional fixture part to which the bracket is always attached at the same level, that is, at the lowest point (see FIGS. 12 and 13).

The following discussion explains the invention, including additional preferred embodiments, in more detail based on the drawings and examples.

FIG. 1 shows a height-adjustable ceiling support 1 according to the invention composed of two parts 10′ and 10″, which ceiling support is attached to the ceiling 9 only by one mounting bolt 8 and is provided with end pieces 3′, 3″ which have lateral support elements 31, 32;

FIG. 2 shows ceiling support according 1 to the invention composed of two parts 10′, 10″, which ceiling support is attached to ceiling 9 only by one mounting bolt 8 and which ceiling support is provided on the ceiling side with an optionally extendable mounting profile 30 x which is supported at a second distance L2 from mounting bolt 8 against ceiling 9;

FIG. 3 shows a ceiling support 1 according to the invention composed of two parts 10′, 10″, which ceiling support is attached to ceiling 9 by only one mounting bolt 8, and bracket 5 of which transfers the force exerted by load 6 through a support element 320 directly to ceiling 9, such that only tensile forces act on the additional parts 2, 3 of ceiling support 1;

FIG. 4 shows a first section A-A through another box-shaped ceiling support 1 shown in FIG. 6;

FIG. 5 shows a second section B-B through the ceiling support 1 shown in FIG. 6;

FIG. 6 shows ceiling support 1 shown in the sectional views of FIGS. 3 and 4, which ceiling support is attached only by one mounting bolt 8 to ceiling 9 and is supported against ceiling 9 by a mounting profile 30 which is retained by mounting bolt 8;

FIG. 7 shows ceiling support 1 of FIG. 1 mounted by a t-slot nut 300 and an eccentrically oriented mounting bolt 8, which ceiling support has bordering base elements 31, 32 in place of mounting profile 30 and eccentrically oriented mounting bolt 8;

FIG. 7 a shows t-slot nut 300 of FIG. 7 in two positions;

FIG. 8 shows ceiling support 1 of FIG. 6 in a U-profile-shaped one-piece design having eccentrically oriented mounting bolt 8 and an elastic closing piece 35;

FIG. 8 a shows a section D-D through ceiling support 1 shown in FIG. 8;

FIG. 9 shows a height-adjustable ceiling support 1S according to the invention composed of two identical S-profile-shaped fixture parts 10S′, 10S″, which ceiling support is installed by a single eccentrically oriented mounting bolt 8;

FIG. 10 shows a height-adjustable ceiling support 1 according to the invention which is composed of two fixture parts 10′, 10″, of which one is of a two-part design;

FIG. 10 a shows a section through installed fixture parts 10′, 10″;

FIG. 11 shows another ceiling support 1 according to the invention with a bridge-shaped end piece 3 which is attached only by one eccentrically oriented mounting bolt 8 to the ceiling and by two pillars 210, 220 to bracket 5;

FIG. 12 shows ceiling support 1 of FIG. 11 with box-shaped fixture parts 10′, 10″ which are able to telescope; and

FIG. 13 [ . . . ]¹ ¹ translator note: duplicates FIG. 12.

FIG. 1 shows ceiling support 1 according to the invention which is composed of two identical fixture parts 10′, 10″ attached to each other by bolts 82. Each of fixture parts 10′, 10″ has an end piece 3′, 3″, and a connection piece 2′, 2″ attached thereto which is composed of three plate-type elements inclined towards each other, a center element 21, and two lateral elements 22, 23. The two lateral elements 22, 23, on the bottom sides of which window openings 20 are provided enabling the passage of bracket 5, are inclined by about 60° outward relative to center element 21, thereby creating a highly open stackable U-profile.

Plate-type end piece 3′, 3″, which is attached by flanges 38 and rivet-type, bonding-type, or tox-type or welded joints 7, or is attached at least partially in a one-piece manner, to connection piece 2′, 2″, has holes 85 to receive mounting bolt 8. In regard to tox-type joints, see, for example, TOX® plate joint systems from TOXIC PRESSOTECHNIK GmbH & Co. KG, D-88250 Weingarten. In order to reinforce connection piece 2, 2′, this piece can be provided, for example, with paraxial beads by which an enhanced rigidity is achieved.

The two fixture parts 10′, 10″ are attached to each other such that their end pieces 3′, 3″ face away from each other so that upper end piece 3″ can be attached to ceiling 9 by mounting bolt 8, while lower end piece 3′ can close off ceiling support 1 at the bottom and optionally support the inserted, for example, C-profile-shaped or U-profile-shaped bracket 5 which bears the load, that is, cable routing device 6.

In addition to the stackability of fixture parts 10′, 10″, ceiling support 1 of FIG. 1 has many additional advantages. In terms of the subsequent discussion, however, it is not important whether ceiling support 1 is fabricated out of one or two parts. Hereafter the two mutually attached connection pieces 2′, 2″ appear as connection piece 2 of the ceiling support. End piece 3′ of upper fixture part 10″ forms the actual end piece 3 of ceiling support 1. Appropriate window openings 20 can be provided for bracket 5 at various levels.

Also plotted in FIG. 1 are forces F_(L), F_(S) and F_(D) which act on bracket 5 which is inserted in ceiling support 1 attached only by one mounting bolt 8. As a result of the retained cable routing device 6, force F_(L) is introduced into bracket 5 acting as a lever which in turn introduces a tensile force F1 on lateral element 22, facing cable routing device 6, of ceiling support 1, and introduces a compressive force F2 on lateral element 23, opposite cable routing device 6, of ceiling support 1. Correspondingly, a tensile force F_(S) is applied to ceiling support 1 by mounting bolt 8, and a compressive force F_(D) is applied by ceiling 9 at the position of opposite lateral element 23 to ceiling support 1. Additionally plotted in FIG. 1 are the first and second distances L1, L2 between the lines of application of tensile force F_(S), and the force effected by the load F_(L) or tensile force F_(S), and compressive force F_(D) applied by the ceiling. The tensile force F_(D) to be produced by mounting bolt 8 is a function of the ratio L1/L2 of distances L1, L2, and of load F_(L), as follows: F _(S)=(L1/L2+1) F _(L)

For the special case L1=0, the applicable relation is: F_(S)=F_(L)

For the special case L1=L2, the applicable relation is: F_(S)=2 F_(L)

The curve for tensile force F_(S) is diagrammed in FIG. 1 as a function of the magnitude of first and second distances L1, L2, and of load F_(L).

What this graph reveals is that second distance L2, and thus the width of ceiling support 1, should be as large as possible so as to achieve the smallest possible tensile force F_(S) for a given load. It is thus advantageous to locate mounting bolt 8 eccentrically as close as possible to the load. With a larger width for ceiling support 1, it is additionally possible to reliably capture the acting torque, thereby preventing any buckling of ceiling support 1.

For the above assertions to be true, it is important that the force introductions into ceiling support 1 be effected at the position indicated in FIG. 1, whereby the introduction of force from ceiling 9 should be effected as far as possible from mounting bolt 8, preferably, in a punctiform manner or along a line.

Use of a mounting bolt 8 allows for the punctiform introduction of tensile force F_(S) from ceiling 9. End piece 3 is preferably of a bridge-shaped design and has, at least at its side opposite the load, a base element 32 serving to introduce load F_(D). To the extent end piece 3 does not have sufficiently high strength, recesses or beads 33 can be used in the region of holes 85 receiving mounting bolts 8 to prevent end piece 3 from pressing against ceiling 9 over a large area, and compressive forces F_(D) from acting on end piece 3. To the extent mounting bolt 8 receives only tensile forces at one point, ceiling support 1 can be rotated about this point by the required degree in a plane parallel to bracket 5 until support element(s) 32 strike ceiling 9. In order to ensure this happens, an elastic spacer or analogously elastic or deformable element 35 (see FIG. 8) can be provided below end piece 3, the element simultaneously forming an esthetically pleasing cover.

In the embodiment shown in FIG. 1, both sides of end piece 3 are provided with bent-down edges, thereby forming support elements 31, 32.

FIG. 2 shows ceiling support 1 of FIG. 1 in another preferred embodiment in which the compressive force of bracket 5 acting within right lateral element 23 is not diverted onto end piece 3 but through an optionally extendable mounting profile 30 x onto ceiling 9. Analogously to bracket 5, mounting profile 30 x is inserted on the ceiling side into window openings 20 and projects from ceiling support 1 facing away from the load. At its end, mounting profile 30 x has a rotatable adjustment screw 320 which acts as a support element. The use of mounting profile 30 x significantly increases second distance L2 and reduces force F_(D) applied by ceiling 9 without the need for ceiling support 1 to be of a wider design.

To the extent mounting profile 30 is held at one end and bracket 5 is held at the other end of ceiling support 1, the two torques F_(L)*L1 and F_(D)*L2 act on ceiling support 1, which result, given the stable design of ceiling support 1, does not cause any problems even in response to the application of greater loads F_(L).

With the design shown in FIG. 3, however, the action of torques F_(L)*L1 and F_(D)*L2 on ceiling support 1 can be avoided completely. In this design, not only the force F_(L) effected by the load but also the counterforce F_(D) exerted by ceiling 9, for example, through the illustrated support element, are transferred directly onto bracket 5. Since the actions of torques are essentially completely avoided, ceiling support 1 can be simplified, designed essentially taking into account the maximum occurring tensile forces F_(D), or reduced to a tension rod.

In order to ensure that support element 320 provided on bracket 5 meets ceiling 9 so as to be able to receive and transfer the required counterforce F_(D), a variable or elastic support element 320 is provided, as shown in FIG. 2. It is also possible to design tension-loaded ceiling support 1 so as to be elastic, or pivotable or articulatedly rotatable preferably only in the plane in which bracket 5 lies, thereby completely compensating the resulting torques F_(L)*L1 and F_(D)*L2 (see FIG. 3 a). Ceiling support 1 is thus loaded only in tension and can therefore be dimensioned advantageously.

It is also possible to design ceiling support 1 advantageously in a different way by utilizing the idea of the invention. FIGS. 4, 5 and 6 show that ceiling support 1, or its fixture parts 10′, 10″, can be formed from four lateral parts 21, 22, 23, 24 which are joined into a rectangular profile. In place of the plate-type end pieces 3 shown in FIG. 1, fixture parts 1, 1′ have openings 20 in the two opposing lateral parts 22, 23, which openings in terms of load serve to receive bracket 5, and on the ceiling side serve to receive mounting profile 30. Mounting profile 30 has an opening to accommodate the passage of mounting bolt 8 and can thus be installed together with ceiling support 1 on ceiling 9. Provided on the two other opposing lateral parts 21, 24 are openings 200 through which a tool can be inserted into the rectangular profile to tighten mounting bolt 8.

Lateral parts 21, 22, 23, 24 preferably have outwardly angled lateral edge elements which contact each other and are attached to each other by screws and/or tox joints.

FIG. 4 shows a first section A-A through ceiling support 1 shown in FIG. 6 which is attached by mounting bolt 8 to ceiling 9. Mounting bolt 8 is passed through and out of opening 20 ² in lateral part 23 and abuts ceiling 9 at a second distance L2 from mounting bolt 8 so as to receive force F_(D) applied there by ceiling 9. ² translators note: reference number corrected.

FIG. 5 shows a second section B-B through ceiling support 1 shown in FIG. 6. It clearly shows that bracket 5 serving to support load 6 is passed through and out of opening 20 in lateral part 22 which is opposite lateral part 23. As FIG. 8 shows, it is also possible to implement a symmetrical design of ceiling support 1 with two mounting profiles 30 which emerge on mutually opposing sides 22, 23 from ceiling support 1, and are each held within the two opposing window openings 20 and by mounting bolt 8. The ends of mounting profiles 30 are bent upward towards ceiling 9, thereby forming support elements 32.

FIG. 7 shows ceiling support 1 of FIG. 6 with support elements 32 located at the corners, which elements receive counterforce F_(D) of ceiling 9. Openings 200, which are provided on lateral elements 24 running parallel to bracket 5, allow not only for the insertion of a tool but also the anchoring of t-slot nut 300 which is inserted into ceiling support 1, screwed into openings 200, and tightened by mounting bolt 8 (see FIG. 7 a). In ceiling support 1, mounting bolt 8 is moved as far as possible towards the load so as to minimize the load torque.

FIG. 8 shows ceiling support 1 in a U-profile-shaped one-piece design with eccentrically mounted mounting bolt 8 and an elastic closing piece 35. FIG. 8 a shows section D-D marked in FIG. 8 through ceiling support 1. It is evident that due to the long second distance L2 only a small load results on ceiling support 1. Elastic closing piece 35 closes off ceiling support in an esthetically advantageous manner, prevents ceiling support 1 from wobbling when no cable or only light cable has been laid in cable routing device 6, and allows the required inclination under load until support element 32 strikes ceiling 9.

FIG. 9 shows a height-adjustable ceiling support 1S composed of two identical S-profile-shaped fixture parts 10S′, 10S″ which are installed by single eccentrically oriented mounting bolt 8. Fixture parts 10S′, 10S″ have three openings 20 oriented towards each other which allow bracket 5 or mounting profile 30 to pass through them. Mounting profile 30 is attached (as in ceiling support 1 of FIG. 8) by mounting bolt 8 which is located eccentrically within the S-loop closest to the load. The tool used to tighten mounting bolt 8 can be easily inserted into the same S-loop. No additional windows are needed to allow insertion of the tool.

As is shown in FIG. 9, fixture parts 10S′, 10S″ can be inserted into each other and fixed. To this end, fixture parts 10S′, 10S″ can be provided with multiple rows of windows 2000 which are slid over each other at a desired level and which then have a locking element 2001 inserted through them. Of course other measures familiar to a person skilled in the art for attaching these two components 10S′, 10S″ are possible.

S-shaped ceiling support 1S has numerous advantages. Fabrication of the identical fixture parts 10S′, 10S″ is extremely simple and inexpensive. A metal plate can be pre-perforated or provided with openings 20, 2000, then stamped and bent. The S-shape provides fixture parts 10S′, 10S″ with great strength. Installation of this ceiling support 1S is much simpler than the installation of a box-type ceiling support since mounting bolt 8 is easily accessible. Another advantage is that having the S-loop at a distance from the load creates a stable base through which counter-torque L2*F_(D) compensating load torque L1*F_(L) is transferred to ceiling support 1S. Interestingly, ceiling support 1S is further stabilized by counter-torque L2*F_(D) since the corresponding S-loop is attached to the ceiling in a pier-like manner. What is also significant in this design is the combination of advantageous functionality and an esthetically optimized appearance—an aspect which is of increasing importance in the area of wiring-installation practice.

FIG. 10 shows a height-adjustable ceiling support 1 according to the invention which is composed of two fixture parts 10′, 10″, of which one is composed of a U-profile-shaped retaining component 102 and a U-profile-shaped closing component 101 which when attached to each other form a rectangular or box-type profile. In this design, installation of bracket 5 and mounting profile 30 is also effected as, for example, in FIGS. 8 and 9, preferably by means of window openings 20, and is thus not further explained here. However, installation of this ceiling support 1 and bracket 5 can be implemented in any other manner familiar to a person skilled in the art.

Upper fixture part 10″ is of a one-piece design and is provided with at least one row of openings 10220 into which a retaining element 1022 is insertable which is located on the center part of retaining component 102 and/or of closing component 101. To the extent they are present, retaining component 102 and/or closing component 102 can thus be engaged at the appropriate level in opening 10220. After retaining component 102 and/or closing component 102 have been engaged, this component needs to be fixed, and a box-type profile needs to be formed simultaneously. Retaining component 102 and closing component 101 are therefore provided with means 1011, 1021, 1023 which enable these two components to be attached to each other in a form-locking manner. Preferably, a snap-lock is formed, as shown by way of an example, by providing the lateral elements of one of the components, or retaining component 101, with openings 1011 which anchor elements 1021 of the other component, or of closing component 101, are able to engage. To ensure anchor elements 1021 do not escape from the openings, the lateral elements of closing component 101 are inserted under retaining strips 1023 which are provided on retaining component 102 and fixed thereby. The retaining components 1022 inserted on one or both sides through openings 10220 remain anchored within fixture part 10″ after retaining component 102 and closing component 101 are attached, as is illustrated in FIG. 10 a.

In order to install this ceiling support 1, one-piece fixture part 10″ is first mounted on the ceiling, after which retaining component 102 is appropriately engaged in this fixture part and fixed by closing component 101. The means for attaching retaining component 102 and closing component 101 can be punched into these components and, as can retaining elements 1022 and wing 1023, cut out and bent out from these, and enable the form-locking attachment of the two components 101, 102. FIG. 10 shows only a section of the elements serving to attach fixture parts 10′, 10″. The dot-dash lines indicate that the elements shown extend downwards or upwards.

FIG. 11 shows another ceiling 1 support according to the invention with a bridge-shaped end piece 3 which is attached to ceiling 9 by eccentrically oriented mounting bolt 8 and t-slot nut 300, and by two pillars 210, 220 to bracket 5.

FIG. 12 and FIG. 13 show ceiling support 1 of FIG. 11 with box-type fixture parts 10′, 100″ which are able to telescope. In the embodiment of FIG. 12, lower fixture part 10′ is located on the inside, while in the embodiment of FIG. 13 it is located on the outside.

To the extent appropriate lateral components in upper fixture part 10′ are completely or partly cut out at appropriate sites, lower fixture part 10′ together with bracket 5 can be inserted completely into upper fixture part 10″. 

1. Ceiling support (1), in particular, for the purpose of installing a cable routing device (6), comprising an end piece (3) attached to a ceiling (9) and a connection piece (2) attaching thereto which is provided with a bracket (5) on which the load (6) to be carried can be laid, characterized in that the ceiling support (1) is mounted on the ceiling (9) only by one mounting bolt (8) provided on the end piece (3) and is supported against the ceiling (9) on the side opposite the load (6) at least by one support element (32, 320) which is located at a second distance (L2) from the mounting bolt (8) such that the load torque with the force (F_(L)) of the load applied by the mounting bolt (8) at a first distance (L1) is essentially completely compensated by the counter-torque with the counterforce (F_(D)) applied to the support element (32, 320) by the ceiling (9) at the second distance (L2).
 2. Ceiling support (1) according to claim 1, characterized in that the end piece (3) is an element attached to the connection piece (2), or that one end of the connection piece (2) forms the end piece (3) and is provided for this purpose with two opposing openings (20; 200) through which at least one mounting profile (30) attached to the ceiling (9) by the mounting bolt (9) is inserted, or into which a t-slot nut (300) attached to the ceiling (9) by the mounting bolt (8) is screwed in.
 3. Ceiling support (1) according to claim 1, characterized in that the end piece (3) attached to the connection piece (2) has, at least on the side opposite the load, a base element serving as a support element (32), or, that the mounting profile (30) inserted into the connection piece (2) forms the support element (32) at the end opposite the load, or a connection piece provided there forms said support element.
 4. Ceiling support (1) according to claim 1, characterized in that the connection piece (2) is provided with punctiform or linear support elements (32) at least on the side opposite the load.
 5. Ceiling support (1) according to claim 1, characterized in that the connection piece (2) is a one-piece or multi-piece U-profile, or a one-piece or multi-piece rectangular profile, or that the connection piece (2) has at least one pillar (21, 22) loaded in tension and one loaded in compression.
 6. Ceiling support (1) according to claim 1, characterized in that the end piece (3) has support elements (31, 32) projecting against the ceiling (9) on the sides facing and opposite the load, and/or that the end piece (3) forms a bridge (5) running parallel to the bracket (5).
 7. Ceiling support (1) according to claim 1, characterized in that a mounting profile (30 x) is provided, which profile is not bolted to the ceiling (9), the end of which opposite the load, or a connection piece there provided, forms the support element (32); or that the bracket (5) on the side opposite the load has a support element (320) contacting the ceiling (9).
 8. Ceiling support (1) according to claim 1, characterized in that the end piece (3) is in contact with the ceiling (9) only by the mounting bolt (8) and the support elements (31, 32), and optionally by a recess provided in the mounting bolt (8).
 9. Ceiling support (1) according to claim 1, characterized in that the mounting bolt (8) is installed eccentrically on the side of the ceiling support (1) facing the load such that the second distance (L2) is preferably at its maximum.
 10. Ceiling support (1) according to claim
 1. characterized in that two mutually attached identical fixture parts (10′, 10″) are provided, of which the first is attached to the ceiling (9) and the second is attached to the bracket (5).
 11. Ceiling support (1) according to claims 1, characterized in that two mutually attached fixture parts (10′, 10″) are provided which have an S-profile.
 12. (canceled)
 13. Ceiling support (1) according to claim 1, characterized in that a first fixture part (10′) mountable on the ceiling (9) is provided with at least one row of openings (10220), and a second fixture part (10″) is provided composed of a retaining component (101) and a closing component (102) which are mutually attachable in a form-locking manner so as to enclose the first fixture part (10′), and of which at least the retaining component (101) and/or the closing component (102) has a retaining element (1022) insertable into an opening (10220). 